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ABSTRACTThe objective of this experiment was to determine the effect of ensiled pineapple waste (P / A) as roughage source on rumen fermentation and feed utilization of native cattle. Four rumen-fistulated Southern Thai native cattle with initial weight 286.1Â ± 48.5. kg were arranged to receive dietary treatments in a 4x4 Latin square design. Each period was lasted for 21 days. Cattle were fed concentrate to roughage at the ratio of 65:35. The roughage used was as follows; 1) 100% ensiled pineapple waste. , 2) 65% P / A and 35% pangola hay (HAY), 3) 35% P / A and 65% HAY and 4) 100% HAY. The results revealed that dry matter intake among dietary treatments was not significantly different (. P> 0.05) (3.70, 3.81, 3.52 and 3.59 kgDM / d). Apparent digestibility of DM, OM, CP, NDF and ADF in cattle fed only P / A as roughage source was higher (P <0.05) than in cattle fed. only HAY. Increased HAY resulted in linearly decreased apparent digestibility of DM, OM, CP, NDF and ADF. Caloric density of diet with only P / A as roughage source (2.96 Mcal / kgDM) was higher (P <0.05) than that of. diet with only HAY (2.67 Mcal / kgDM). Ruminal temperature, pH and ammonia-nitrogen concentration were not different (P> 0.05). Acetic acid, propionic acid and butyric acid concentrations were not significantly different (P> 0.05) among dietary treatments. . Blood urea-nitrogen was similar among dietary treatments. In conclusion, P / A is promising to use as a roughage source for Southern Thai native cattle.
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